Therelationships among the ground reaction forces, the duration of passage through the air and the vertical impulse during stop jump shot were analyzed.

分析急停跳投阶段地面对测试对象的作用力、测试对象的腾空时间、垂直方向冲量等几个量之间的关系；

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Drivers have to jump off a chair onto the injured leg and suffer no undue reaction to prove that they can withstand the rigours of a long race.

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Railway officials are also puzzled by the driver and his assistant's apparent lack of reaction - they do not appear to have tried to jump off the train or apply brakes.

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The initial reaction to the news saw stocks of property developers recover from earlier losses and jump 1 to 2% before settling down in the afternoon with modest gains for the day.

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